Spinning pump



Patented 1:... 16, 1 930 UNITED STATES PATENT .ol-"r ca CHARLES W. LAWBEB, OI ABSIGHOB TO 'WIOAOO CHIN COR- POBA'IION, OI PHILADELPHIA, PENNSYLVANIA, A CORPORATION OI PENNSYL- VANIL srmnmq rm Application filed December 15, 1928. Serial No. 154,973.

Thisinvention relates to improvements pum s of the type used in the manufacture of arti cial silk for forcing the plastic material through'thespinneret. The principal object of the inventlon sto provide a novel and improved plunger and actuating cam assembly afiording advantages of supenor strength and durabili y.

- Another object of the inventions to pro vide a novel operative connection between the plunger-actuating cam and the plungers such that requirement for flexible parts to compensate for changes of relative position-between the plungers and the'cam is eliminated.

A further ob ect of the invention isto rovide novel and improved means for ad usting the stroke of the plungers.

In the attached drawings Figure 1 shows a longitudinal section through apump made in accordance with my invention;

Fig. 2 is a detached view of one of the pll'mgers;

Fig. 3 is a plan view of the cam plate,

and

Figs. 4 and'5 are side views.

With reference to thedrawings, the pump comprises the usual cylindrical casing 1 in which is mounted a rotor 2, the latter including a shaft extension 3 which projects through the cylindrical head 4 of the casing 1 and has attached to its outer end a gear 5 by means of. which the rotor 2 is rotated. The casing comprises also a detachable head 6 at its opposite end having on the inside a spherical recess or seat 7 for a correspondingly formed cam-supporting member 8. The member 8 has a projection 9 on its under side which projects through a transverse slot 10in the head 6, and has a threaded extremity 11 of reduced diameter which projects beyond the outer end of the head 6 and receives a nut 12. This nut when tightened against the end of the head 6, retains the member 8 in adjusted position in the seat 7 This adjusted osition of the member 8 is also maintained by means of a pair. of set screws '13 and 14 which are threaded in the head 6 and project from opposite ends into 60 the slot 10, as clearly illustrated, to bear against opposite sides of the extension 9 of the member 8. By loosening the nut 12 and thereafter adjusting the set screws 13 and 14 the position of the member 8 may be varied as desired, and by tightening thenut 12, the member 8 is locked in the adjusted position.

Seated for rotation in the member 8 is a I cam 15, (ylindrical in form and having at its under si e a cylindrical extension 16 which fitsinto a corresponding recess in the upper face of the member 8, as clearly illustrated. The cam comprises on its u tral conical recess 17 in w ball 18, and pressure is applied to the ball through a rod 21 mounted in the rotor 2 and In the present instance the. rod 21 occupies a central passage 20 extending completely through the rotor from end to end, and the outer end 36 of the rod is threaded in the countersunk and threaded outer end of said passage. The end 36 of the rod is also slotted for reception of screw driver whereby the rod may be adjusted longitudinally in the seating of the cam for both movements of the plungers.

per face a cen-. 10h 1s seated a e5 adjustable longitudinally of the rotor from the exterior of the casing.

,As well shown, thecam 15 also comprises a'plurality (three in the present instance) of radial recesses 22 which as shown in Fig. 4 are substantially cylindrical in cross section and which extend inwardly from the side face of the cam and also open into the upper cam face through slots 23 of lesser width where it joins the cylindrical portion ofthe recess than the diameter of the latter. The sides of the slot 23 as indicated at 24 slope outwardly away from each other and towards the upper face of the cam.

I The cylindrical recesses 22 are adapted to receive the substantially siherical end portions of plun rs 26 a apted to slide in longitudinal cylindrical bores 27 in the rotor 2. I

It will be noted that the spherical ends of the'plungers are connected to the main plunger bodies by restricted necks 28 which are lesser in width than the narrowest portions of the slots 23, and this in conjunction with the outwardly sloping sides of side slots 23 permits relative movement between the cam and the lungers in planes transverse to the longitu inal center lines of the cylindrical recesses 22.

It is also noted that the construction permits relative movement between the cam and the spherical portions 25 of the plungers longitudinally of the recesses 22. Provision,

as described, for these relativemovements between the cam and the plunger fullycomn pensates for the changes in the relative positions of these parts due to the inclined position of the cam 15, as shown in Fig. 1 and its rotation about an axis which is inclined to the axis of rotation of the piston 2.

The foregoing description will afford a full knowledge to those acquainted with the art of the construction andoperation of the improved'pump. The cylindrical bores 27 in which the plungers operate areconnected with ports 29 and 30 in the walls of the casing'l, which ports respectively connect with channels 31 and 32 extending, in the present instance, through a projection. 33 of the casting 1, and these channels 31 and 32 respectively connect with ports 34 and 35 at opposite sides of the extension 33 which are adapted to be respectively connected with a source of supply of the viscous substance from which the artificial silk is formed and the spinneret through which the pump discharges the substance after drawing it in through the port 35.

It will be noted that the plungers 26 are rigid throughout their length, and that the compensatory movement between the rotor 2 and the cam 15 is accomplished entirely through an actual relative movement between the cam and those parts of therotor engaged by. the latter. y

I claim:

1. A spinning pump comprising a cylinder, a rotor in the cylinder, plungers adapted for longitudinal reciprocation within the rotor, the. lower ends of said plungers ter minating in spherical portions, a cam adapted to rotate about an axis inclined to the axis of rotation of said rotor and including radial recesses for reception of the projecting spherical ends of said plungers, said recesses extending radially inwardly from-the outer edge of said cam and having radial slots opening into said recesses from the face of said cam adjacent to the said plungers,

adapted to pass looselz with a cylindrical 088105, casing having a longitu adapted to operate m said bore, and an actuating member adapted to rotate within the casing about an axis at an angle to the axis of said rotor, said member having a cylindrical recess extending radially inwardly from its edge and having a radial slot opening into said recess from the face of the member adjacent the said rotor, and said plunger having at its outer end a spherical part adapted to fit slidably within said recess and having adjacent thereto a restricted part through the said slot in the actuating mem er whereby to permit relative movement between the plunger and the actuating member in a plane transverse to the longitudinal axis of said recess.

3. A spinning pump comprising a cylinder, a rotor mounted in the cylinder, plungers adapted for longitudinal reciprocation within the rotor, a plunger-actuating cam adapted to rotate about an axis inclined to the axis of rotation of said rotor, means carried by the rotor for positively preventing movement of the cam toward the rotor, said means adapted to be adjusted to and held in different positions longitudinally of said rotor, and means for rotating the rotor in the cyllnder. j

4; A spinning pump comprising a cylinder, a rotor mounted in the cylinder, plungers adapted for longitudinal reciprocation withinthe rotor, a plunger-actuating cam seated-in the casing and adapted to rotate about an axis inclined to the axis of the rotor,

means accessible from the exterior of the pump for regulating the position of the last mentioned means toward and from the said cam, means cooperative with the rotor for positlvely retaining the cam on its seat, and means for rotating the rotor in the cylinder.

5. A spinning pump comprising a cylinder, a rotor mounted in the cylinder, plungers adapted for longitudinal reciprocation within the rotor, a plunger-actuating cam seated in the casing for rotation about an axis inclined to the axis of the rotor, manu ally adjustable means carried by the rotor for retaining the cam on its seat, and means for rotating the rotor in the cylinder.

6. A spinning pump comprising a cylinder, a rotor in the cylinder, plungers ada ted for longitudinal reciprocation within t e rotor, a plunger-actuating cam seated in the casing for rotation about an axis inclined to the axis of the rotor, manually adjustable means between the rotor and the cam for retaining the cam on its seat, and means for rotating the rotor in the cylinder.

7. A spinning pump comprising a cylinder, a rotor mounted within the cylinder, plungers adapted for longitudinal reciprocation within the rotor, a plunger-actuating cam seated in the casing for rotation about an axis inclined to the axis of the rotor, manually adjustable means carried by the rotor for exerting a pressure on the cam to retain it on its seat, and means for rotating the rotor in the cylinder.-

8. A spinning pump comprising a cylinder,-a rotor mounted in the cylinder, plungers adapted for longitudinal reciprocation wlthin the rotor, a plunger-actuating cam seated in the casing for rotation about an axis in-' clined to the axis of the rotor, means .carried by the rotor for retaining the cam on its seat, means providing for manual adjustment of said retaining means to take up wear developing between the parts, and meansfor rotating the rotor in the cylinder.

9. In a spinning pump, the combination with a cylindrical casing, of a rotor mounted in the casing, said rotor having an axial concentric extension projecting through one end of said casing and also having an axial openin extending therethrough, plunger-s adapted for longitudinal reciprocation within openings provided in and extending longitudinally of the rotor, a plunger-actuating cam seated in the casing at the inner end of the rotor and adapted for rotation on'said seat-about an axis inclined to the axis of the rotor, a plunger in the inner end of said axial opening arranged to bear against the adjacent face of the cam, a rod mounted in the said axial opening and in contact at its inner end with said plunger and threaded at its outer end in the outer end of said axial opento rotate aboutan axis inclinedto the axis of rotation of said rotor and including radial recesses and the face of the cam being provided with radial slots which open at their inner sides into the said recesses, plungers adapted for longitudinal reciprocation. 7

within the rotor and having spherical extremities adapted to be loosely confined in said radial recesses and joined to the bodies of the plungers by restricted necks which pass through the said longitudinal slots, and means for rotating the rotor in the cylinder.

CHAS. W. LAWSER.

ing, said rod bein adjustable from the outer projecting extenslon'of the rotor to regulate the pressure exerted by the plunger on the rotor, means for locking the said rod in the adjusted position, and means carried by the projecting extension of said rotor for rotating the rotor in the casing.

10. A spinning pum com rising a cylin-' der, a rotor in the cylinger, p ungers adapted for longitudinal reciprocation wlthin'the'rotor, a cam adapted-to rotate about an axis inclined to the axis. of rotation of said rotor piston and including radialrecesses for rece'tion and retention ofthe projectin 'ends 0 said lungers in which the retained ends of the p ungers are. freely movable radially of the cam, adjustable means operative be tween the rotor-andthe cam forpositively preventing movement of the cam toward the rotor, and means for. rotating the rotor in the cylinder. I

11. A spinnin pump comprising a cylinder, a rotor in t e cyhnder, a cam adapted 

